Fillings and crowns available on the NHS can be made of several different materials. Ask your dentist what material they recommend, as some will be more suitable than others.

Fillings and crowns available on the NHS can be made of several different materials.

Ask your dentist what material they recommend, as some will be more suitable than others.

Fillings

Fillings are used to repair a cavity in your tooth caused by decay. The most common type of filling is dental amalgam, made from a mixture of mercury and different metals. Dental amalgam fillings are often used on your back teeth as they are hard-wearing.

Your dentist will offer you the type of filling most appropriate for your clinical (medical) needs. This may include a tooth-coloured (white) filling. For example, if you need a filling for one of your front teeth, your dentist may suggest a tooth-coloured filling, but the use of tooth-coloured fillings on back teeth is considered purely cosmetic.

Fillings on the NHS can be made of:

amalgam (silver-coloured) – a mixture of metals including mercury, silver, tin, and copper

composite (tooth-coloured) – powdered glass and ceramic added to a resin base; they're not as hard-wearing as amalgam fillings

glass ionomer (tooth-coloured) – powdered glass, which reacts chemically with your tooth and bonds to it, but it is weak so is only used on baby (first) teeth or around the sides of teeth

Crowns

A crown is a type of cap that completely covers a real tooth. Crowns on the NHS can be made of:

alloys (mix of metals) containing not less than a third of fine gold, platinum, or palladium

alloys containing stainless steel, cobalt chromium or nickel chromium

porcelain

porcelain bonded to precious metals

alloys bonded to wrought platinum coping

ceramic

glass

gold alloy crowns

Prefabricated crowns (crowns made ahead of time) are made from plastic and metals. These are used temporarily until a permanent crown can be fitted.